Desk lamp



FIG. 1 is a front perspective view from above of a desk lamp showing my new design;

FIG. 2 is a front perspective view from below thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 5 is a right side elevational view thereof, the left side elevational view being a mirror image; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a desk lamp, as shown and described. 